目的 有机酸溶剂体系对壳聚糖的成膜性能至关重要，探讨其潜在的分子机制，可为壳聚糖膜的相关研究提供理论参考。方法 综述壳聚糖的化学组成和成膜机制，以及壳聚糖在不同有机酸溶剂体系中成膜的力学性能、溶胀性、氧气透过率、水蒸气透过率等特性。结果 有机酸溶剂体系可为壳聚糖的溶解提供更多的质子，从而促进壳聚糖分子在水中的溶解。此外，有机酸分子结构中羧酸和羟基数量、碳链长度不同，其与壳聚糖分子间形成的氢键和离子作用力不同，进而可在很大程度上影响壳聚糖的成膜性能。结论 有机酸溶剂体系对壳聚糖膜的性能具有较为显著的影响，这有助于提高其作为可食用膜在改善食品品质和保鲜方面的适用性。

The organic acid solvent system is very significant for the film-forming properties of chitosan. The work aims to explore its potential molecular mechanism to provide a theoretical reference for the related research of chitosan films.The chemical composition and film-forming mechanism of chitosan, as well as the mechanical properties, swelling property, oxygen permeability and water vapor permeability of chitosan films were reviewed in different organic acid solvent systems.Theorganic acid solvent system can provide more protons for the dissolution of chitosan and realize the solubility of chitosan in water. In addition, the number of carboxylic acids and hydroxyl groups in the molecular structure of organic acids, the length of carbon chain, the hydrogen bond and ionic force between organic acids and chitosan were different, which can greatly affect the film-forming performance of chitosan. Theorganic acid solvent system has a crucial effect on the performance of chitosan film, which helps to enhance its applicability in improvement of food quality and preservation.